NDLI: High Density Heat-Assisted Magnetic Recording Media and Advanced Characterization

Content Provider	IEEE Xplore Digital Library
Author	Ganping Ju Yingguo Peng Chang, E.K.C. Yinfeng Ding Wu, A.Q. Xiaobin Zhu Kubota, Y. Klemmer, T.J. Amini, H. Li Gao Zhaohui Fan Rausch, T. Subedi, P. Minjie Ma Kalarickal, S. Rea, C.J. Dimitrov, D.V. Pin-Wei Huang Kangkang Wang Xi Chen Chubing Peng Weibin Chen Dykes, J.W. Seigler, M.A. Gage, E.C. Chantrell, R. Thiele, J.-U.
Copyright Year	1965
Abstract	Heat-assisted magnetic recording (HAMR) is being developed as the next generation magnetic recording technology. Critical components of this technology, such as plasmonic near-field transducer (NFT) and high anisotropy granular FePt media, as well as the performance and reliability of fully integrated drives have been reported. This paper will focus on the progress and challenges of HAMR media, including microstructure and thermal design as well as the testing and characterization at high field and high temperature. Due to the importance of the Curie temperature distribution, σT_C, for HAMR, we present a newly developed temperature-dependent complex ac susceptibility method to extract σT_C for HAMR media. Such novel magnetic characterization methods have been used in combination with other high field magnetic metrology and spin-stand recording to provide feedback for continuous improvements of HAMR media. Together with NFT and write head design, the thermal design, σT_C, and microstructure of the media are key factors to reduce the transition jitter below 2 nm as demonstrated in a previously reported 1 Tb/in² HAMR demonstration. Here, we report the further improvements by significantly enabling higher linear density (>2500 kfci) HAMR and steady progress in areal density to 1.402 Tb/in².
Sponsorship	IEEE Magnetics Society
Starting Page	1
Ending Page	9
Page Count	9
File Size	2677815
File Format	PDF
ISSN	00189464
Volume Number	51
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Media Heat-assisted magnetic recording Thermal conductivity Temperature measurement Temperature distribution Magnetic heads media microstructure HAMR (Heat assisted magnetic recording) BTD demo NFT (Near field transducer) FePtX media TC distributions thermal design Basic technology demonstration (BTD) demo heat-assisted magnetic recording (HAMR) near-field transducer (NFT) $T_{C}$ distributions
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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HAMR Areal Density Demonstration of 1+ Tbpsi on Spinstand

Writer and Reader Head-to-Media Spacing Sensitivity Assessment in HAMR

Characterization of Laser-Induced Protrusion in HAMR by the Burnish Method

Lowering HAMR Near-Field Transducer Temperature via Inverse Electromagnetic Design

An Experimental Investigation on Curie Temperature Variations and Related Switching Field Distributions in Heat-Assisted Magnetic Recording Media

Investigation on the Effect of an In-Plane Auxiliary Field on the SNR of HAMR Recording Systems

Efficient Integrated Light-Delivery System Design for HAMR: Maximal Optical Coupling for Transducer and Nanowaveguide

Novel Mach–Zehnder Interferometer Waveguide Design as a Light Delivery System for Heat-Assisted Magnetic Recording

A New AFM-Based Technique to Detect the NFT Protrusion on HAMR Head

High Density Heat-Assisted Magnetic Recording Media and Advanced Characterization—Progress and Challenges

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HAMR Areal Density Demonstration of 1+ Tbpsi on Spinstand

Writer and Reader Head-to-Media Spacing Sensitivity Assessment in HAMR

Characterization of Laser-Induced Protrusion in HAMR by the Burnish Method

Lowering HAMR Near-Field Transducer Temperature via Inverse Electromagnetic Design

An Experimental Investigation on Curie Temperature Variations and Related Switching Field Distributions in Heat-Assisted Magnetic Recording Media

Investigation on the Effect of an In-Plane Auxiliary Field on the SNR of HAMR Recording Systems

Efficient Integrated Light-Delivery System Design for HAMR: Maximal Optical Coupling for Transducer and Nanowaveguide

Novel Mach–Zehnder Interferometer Waveguide Design as a Light Delivery System for Heat-Assisted Magnetic Recording

A New AFM-Based Technique to Detect the NFT Protrusion on HAMR Head

High Density Heat-Assisted Magnetic Recording Media and Advanced Characterization—Progress and Challenges